Find the tilt latches sash releases at the top of the window and slide them inward while pulling toward you.
How to open double hung windows for cleaning.
Then repeat on the left side.
If your window does not have tilt latches push the right jambliner the frame the window runs on towards the wall while pulling on the upper corner of the sash.
Squeeze the two tilt latches and gently pull.
They include two panels of glass with a layer of gas between the panels.
Charles benedict from hardy jensen gives a 90 tutorial on how to open a double hung window so that it can be clean from the inside of the home.
Steps for cleaning double hung windows.
How to clean foggy dual pane windows.
Raise the bottom sash up six to eight inches.
Completely unlock your windows by moving the latches on the bottom sash inwards.
Locate the tilt hatches on the window s bottom sash and pull inwards as though the hatches are meeting in the middle.